{
  "ptid_time": "005_S_0553_2008-07-08",
  "img_path": "/data/qiuhui/data/adni/images/005_S_0553/2008-07-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 38,909 mm³, 17.2% below the reference mean. With a Z-score of -0.50 (30.8th percentile), this represents normal volume ; hippocampal volume measures 7,457 mm³, 7.0% above the reference mean. With a Z-score of 0.61 (72.8th percentile), this represents normal volume ; whole brain volume measures 1,008,350 mm³, 2.0% below the reference mean. With a Z-score of -0.26 (39.6th percentile), this represents normal volume ; entorhinal cortex volume measures 3,792 mm³, 4.5% below the reference mean. With a Z-score of -0.29 (38.5th percentile), this represents normal volume ; fusiform gyrus volume measures 15,360 mm³, 15.0% below the reference mean. With a Z-score of -1.30 (9.7th percentile), this represents mild atrophy; middle temporal gyrus volume measures 21,424 mm³, 6.2% above the reference mean. With a Z-score of 0.56 (71.1th percentile), this represents normal volume . ",
  "text_data": "Age is 86.6 years. Gender is Male. Education: 18 years. MMSE: 30.0. Logical Memory: 22.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show mostly normal values, with only mild atrophy in the fusiform gyrus (Z-score -1.30, 9.7th percentile). The hippocampal volume is normal (Z-score 0.61, 72.8th percentile), and the MMSE score of 30/30 indicates intact cognitive function. The absence of APOE4 alleles further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T21:09:51.543434"
}